Use of Nondestructive Techniques for Determination of Tension Parallel-to-Grain Properties of Spruce

Gil-Moreno, David; O'Ceallaigh, Conan; Ridley-Ellis, Dan; Harte, Annette M

Abstract

The paper presents a study of the tension properties of Irish-grown Sitka spruce. Fifty timber pieces were destructively tested having resonant frequency and knots measured. The aim was to improve knowledge of the performance of spruce in tension and to check the suitability of the equations given in the European standards to calculate secondary properties from grade determining properties. Static stiffness, which limited the grading of the dataset, was largely predicted using dynamic modulus of elasticity (MoEdyn). Tension strength was modelled using density and tKAR index. It was found also that adding MoEdyn in a linear regression was not useful. The research reveals that the equation given in EN384:2018 for tension strength, based on populations of higher stiffness than Irish spruce, results in values that may not be appropriate for Irish-grown spruce timber.

Citation

Gil-Moreno, D., O'Ceallaigh, C., Ridley-Ellis, D., & Harte, A. M. (2019). Use of Nondestructive Techniques for Determination of Tension Parallel-to-Grain Properties of Spruce. In Proceedings: 21st International Nondestructive Testing and Evaluation of Wood Symposium, Freiburg, Germany 2019 (233-240)

• Conference Name: 21st International Nondestructive Testing and Evaluation of Wood Symposium
• Conference Location: Freiburg, Germany
• Start Date: Sep 24, 2019
• End Date: Sep 27, 2019
• Publication Date: Sep 25, 2019
• Deposit Date: Sep 11, 2021
• Pages: 233-240
• Book Title: Proceedings: 21st International Nondestructive Testing and Evaluation of Wood Symposium, Freiburg, Germany 2019
• Keywords: grading; NDT; sawn timber; spruce; tension; wood properties; strength; standards
• Public URL: http://researchrepository.napier.ac.uk/Output/2801267
• Publisher URL: https://www.fs.usda.gov/treesearch/pubs/58690